The weekend storm continues on Monday with moderate to heavy snow in the northern zone. The first wave brought accumulating snow to the southern, central, and southern part of the northern zone, while the second wave primarily brought, and continues to bring, heavier snow to the northern zone. 

Valle Nevado, La Parva, El Colorado, and Portillo should receive an additional 10 to 20 cm of snow by Tuesday morning, though snow levels will rise during this time. Much lower amounts are expected to the south. They may climb up above base elevations on Monday afternoon. Below is the additional snowfall expected through Tuesday morning. 

A weak storm will then cross the region from Tuesday afternoon through Wednesday, bringing an additional 5 to 15 cm in the northern zone and the southern half of the central zone. The latest forecast for this follow-up storm from the European model is shown below.  

Snow levels will be a bit higher during this storm, with some rain mixing in at lower elevations. Upper elevations, especially around Las Lenas, could see as much as 20 cm from this system. 

We will dry out briefly from late Wednesday through early Friday before the next system moves in. Another area of low pressure will move through the region from Friday afternoon through Saturday, bringing more rain and snow. The latest forecast guidance keeps snow totals under 20 cm, so it doesn't look like this will be a major event. 

Another storm is possible from Sunday to Monday, but it too looks to be on the weaker side, and warm as well. A strong ridge is then expected to develop just off the coast of Chile early the following week, possibly sticking around for five to seven days, This would prevent storms from impacting the region during this time. 

My next post will be on Wednesday.

Thanks for reading the South America Daily Snow!

Luke Stone
Forecaster, OpenSnow

NEW: Forecast Range Graphs

You can now view individual forecasts from global and regional high-resolution weather models in OpenSnow. This includes forecasts from the GFS, ECMWF, HRRR, and ICON models, as well as the OpenSnow blend.

The graphs give you a behind-the-scenes look at the forecast and make it easier to see if the forecast models are in tight agreement or if there is a wide range of potential outcomes over the next 10 days.

Note: This is currently only available in the OpenSnow iOS app and website (OpenSnow.com). Android will be available soon.

Getting Started

1. Go to any location screen.
2. Scroll down under "Weather" or "Snow Summary".
3. Tap "View Interactive Chart" in the app.
4. Adjust the model, timeframe, or data view.

Why is the Forecast Range helpful?

Understand if there is high or low confidence in the forecast. If all models show a similar forecast, there is higher confidence in the forecast, and vice versa.

Dig into the details. If you have experience looking at weather model data and trust certain models or higher-resolution models, you'll be able to isolate your favorite data.

View → Forecast Range Graphs